Re: [gpsd-users] strange - currently only few satellites

[David J Taylor]

Dear David,

This is actually a nice idea to feed MRTG with satellites numbers.
MRTG is running all 5 minutes typically. So it would be nice to have
an average number of satellites of the last 5 minutes instead of
just the value when MRTG is executed.

I setup several MRTG's in the past but always reading the values
with SNMP. No idea how to read data in a different way.

This simple script below would just print out the number of
available satellites at moment when it's started.

gpspipe -r | egrep --line-buffered  'GPGSA' | head -1 | gawk  '-F,' '
{
 CNT=0 ;
 if ( $1 ~  /GPGSA/ ) {
   for (i = 1; i <= NF; i++) {
     if ( $i != "" ) {
       CNT++ ;
     } ;
   } ;
   print ( CNT - 6 ) ;
 } ;
}'

Kind regards
Hans
==============================

Thanks for that, Hans.  I'm also using it via SNMP with a "pass" command.

Are you sure that 6 is the correct number to subtract?  With cgps -s I see 
11 satellites, and without subtracting anything from CNT I get a response of 
11 or 12.  Seems a little hit and miss!

Cheers,
David
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